| Report Year: 2009 |
| Lake Hendricks, Howard County |
| Carbon Balance Table |
| Parameter | 6/24/2009 | 7/29/2009 | 2009 | 2008 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001 | 2000 |
| Alkalinity as CaCO3 (mg/L) | 88 | 80 | 84.0 | - | - | - | 87.3 | 86.0 | 61.0 | 82.2 | 73.7 | 107.0 |
| Dissolved Organic Carbon (mM) | 0.46 | 0.51 | 0.48 | - | - | - | 0.55 | 0.45 | 0.73 | 0.90 | - | - |
| Temperature (oC) | 25.2 | 22.9 | 24.0 | - | - | - | 25.4 | 22.8 | 23.1 | 25.0 | 23.9 | 23.8 |
| Specific Conductivity (μS/cm) | 270.0 | 250.0 | 260.00 | - | - | - | 269.10 | 326.79 | 277.03 | 344.13 | 268.43 | 319.72 |
| pH | 9.1 | 9.4 | 9.3 | - | - | - | 9.6 | 9.1 | 9.4 | 9.4 | 9.7 | 8.7 |
| I (Ionic Strength ?) | 0.0473 | 0.0438 | 0.0455 | - | - | - | 0.0471 | 0.0572 | 0.0485 | 0.0602 | 0.0470 | 0.0560 |
| Dissolved Inorganic Carbon (mM) | 1.56 | 1.30 | 1.43 | - | - | - | 1.30 | 1.51 | 0.99 | 1.33 | 1.07 | 2.00 |
| pCO2 (μatm) | 46 | 18 | 31.9 | - | - | - | 63.7 | 89.0 | 38.2 | 28.7 | 20.9 | 355.3 |
| Equilibrium CO2 | 12.59 | 13.43 | 13.01 | - | - | - | 12.53 | 13.51 | 13.42 | 12.67 | 13.35 | 13.12 |
| CO2 (μM) | 1.58 | 0.64 | 1.11 | - | - | - | 2.33 | 3.32 | 1.48 | 1.02 | 0.92 | 12.90 |
| Δ CO2 from Equilibrium | -11.016 | -12.789 | -11.90 | - | - | - | -10.20 | -10.19 | -11.94 | -11.65 | -12.42 | -0.23 |